Hi Xavier -
Here are references to papers on turtle eggs (search on egg :-) ) and
also a Spanish language website of some interest:
http://dml.cmnh.org/2008Jul/msg00132.html
Cordially,
John V. Jackson
Dear All,
We have agreed with José Ignacio Canudo and Miguel Moreno-Azanza to a
collaboration between our list and their institution.
Basically, all the papers the list will be distributing will be
inserted in their extensive publication database
http://www.aragosaurus.com/index.php?seccion=publish
They also welcome any PDF papers are not on their website.
Thus, anybody interested could send them to "José Ignacio Canudo"
<jicanudo@...>
We will also be marketising our two groups as much as possible.
Aragosaurus recently announced in their website our collaboration.
http://www.aragosaurus.com/?seccion=news_full&id=550
Have a good summer,
Xavier Panades
Hi Charles,
I have been trying unsuccessfully to contact the two guys that were in
contact to see whether it was ever published.
I have never got a single answer.
You are more than welcome to try yourself.
Louis Chiappe chiappe@...
Rafael Coria coriarod@...
Subject: [Palaeoology] Fourth International Symposium on Dinosaur Eggs and Babies
4th INTERNATIONAL SYMPOSIUM ON DINOSAUR EGGS AND BABIES
Second Circular
August 8-14, 2009 Montana State University Bozeman, Montana
Host Committee:
David Varricchio, Committee Chair, Department of Earth Sciences, Montana State University John R. Horner, Museum of the Rockies, Montana State University Frankie Jackson, Department of Earth Sciences, Montana State University Darla Zelenitsky, Department of Geoscience, University of Calgary, Calgary, Alberta
The Fourth International Symposium on Dinosaur Eggs and Babies will convene in Bozeman, Montana August 8 – 10, 2009. Montana State University is located in south central Montana near the Bridger, Gallatin, and Madison mountain ranges and an hour and a half drive from Yellowstone National Park (see http://www.bozemanchamber.com/). Weather in Bozeman in August is warm, sunny and dry. Average high and low temperatures are 22 C and 6 C. The Museum of the Rockies, located on the MSU campus, has a large collection of Mesozoic specimens, including Late Cretaceous dinosaur eggs, nests and embryos, in addition to an outstanding collection of dinosaur remains.
Schedule
Saturday, August 8 (evening) - Opening reception at Museum of the Rockies.
Sunday, August 9 and Monday, August 10 - Symposium talks and poster sessions.
Presentations at previous Dinosaur Eggs and Babies meetings have included dinosaur egg localities, specimen descriptions, field and laboratory methods, biostratigraphy of eggshell, preservation and experimental taphonomy, egg classification and ootaxonomy, eggshell microstructure and function, geochemical signatures of diet and diagenesis, embryos and growth, reproductive behavior, phylogenetics of eggshell and reproductive traits, and the origins of avian reproduction. The 4th Symposium welcomes papers on these or any other topic related to dinosaur reproduction, eggs and young. The technical program will accommodate both oral presentations and posters. Abstract submissions are due by May 1st, 2009 and are limited to 250 words. Details on abstract submission will be provided in the third circular. For those interested, we will publish a symposium volume in a special issue of Historical Biology. Because of the tight publication schedule, adherence to the following time line for participation will be strictly enforced.
May 1, 2009 - abstract for symposium presentations and/or volume (250 word limit) Oct. 1, 2009 - deadline of submission of full article Mar. 1, 2010 - deadline for review and revisions August, 2010 - publication
Field Trips
August 11 and 12 - Fieldtrip (option 1)
Two days, one night field trip to Egg Mountain locality in the Late Cretaceous Two Medicine Formation of western Montana with overnight stay in Choteau. Day 1 includes tour of the Egg Mountain localities. Day 2 will be spent visiting additional Two Medicine localities and the East Front of the Rocky Mountains.
August 11 through 14 - Fieldtrip (option 2)
Four days, 3 nights. Day 1 of this field trip will begin with visiting Egg Mountain, with over night in Choteau. Day 2 will be spent at Devil's Coulee nesting locality in the Oldman Formation of Alberta. Day 3 will consist of a visit to the Royal Tyrrell Museum of Paleontology in Drumheller, Canada, and day 4 will include a visit to Dinosaur Provincial Park. This trip will end in Calgary, Canada, with an option to return to Bozeman. Please note that participants should be aware of the necessary requirements needed to cross into and out of Canada.
Accommodations
Dormitory rooms are available on campus during the conference from Aug 7 – 10, with checkout on Aug. 11. Alternatively, several motels (in addition to restaurants, bars and shopping) are located in the downtown area, approximately 30 minutes walking distance from campus and the museum. If renting a car, other motels are located near the freeway, approximately 4 miles or 15 minutes driving distance. Due to closure of the dorms Aug. 11, participants in the post-meeting field trips will need to arrange alternative accommodations for their return to Bozeman. Excess luggage, however, may be stored during the field trips. Bozeman offers very limited taxi service (i.e. 3 vehicles); therefore, a list of hotels with and without airport shuttles is included. We recommend that if you are not staying in the dormitory during the conference you may want to rent a car or enjoy walking.
Motels
The following motels offer airport shuttle but are not within walking distance of the museum or campus. In addition, public bus transportation to campus is not available on weekends.
Wingate – 1 866-910-4995 222 (www.wingatebozeman.com) Hampton Inn – 1-800 HAMPTON (www.hampton.inn.com) Hilton Garden Inn – 1-406 582-9900 (www.bozeman.stayhgi.com) Best Western Grandtree Inn – 1-800-624-5865 (www.bestwesterngrandtree.com)
Please Note: The Best Western Grandtree Inn offers a significant discount ($149 vs. $84/room) if 10 rooms are booked for field trip participants in advance for the evening of August 14, 2009. Let us know if you are interested.
Other Motels/ Bed & Breakfast within 30 min walking distance of the museum and campus but without airport shuttle service.
City Center Motor Inn – 1 (406) 587-3158. Lewis & Clark Motel of Bozeman – 1 (406) 586--3341 Imperial Inn – 1 (800) 880-2383; 1 (406) 586-3354 Voss Inn Bed and Breakfast – 1 (406) 587-0982
The host committee welcomes your comments and suggestions and we are looking forward to the 4th International Symposium on Dinosaur Eggs and Babies in Bozeman!
Mimo kanceláø budu od 30.06.2008 a nevrátím se do 07.07.2008.
Bohu¾el jsem mimo kanceláø. Jakmile se vrátím, Va¹e vzkazy ráda vyøídím.
Dìkuji za pochopení a pøeji hezký den.
4th INTERNATIONAL SYMPOSIUM ON
DINOSAUR EGGS AND BABIES
Second Circular
August 8-14, 2009
Montana State University
Bozeman, Montana
Host Committee:
David Varricchio, Committee Chair, Department of Earth Sciences,
Montana State University
John R. Horner, Museum of the Rockies, Montana State University
Frankie Jackson, Department of Earth Sciences, Montana State University
Darla Zelenitsky, Department of Geoscience, University of Calgary, Calgary,
Alberta
The Fourth International Symposium on Dinosaur Eggs and Babies will convene in
Bozeman, Montana August 8 – 10, 2009. Montana State University is located in
south central Montana near the Bridger, Gallatin, and Madison mountain ranges
and an hour and a half drive from Yellowstone National Park (see
http://www.bozemanchamber.com/). Weather in Bozeman in August is warm, sunny
and dry. Average high and low temperatures are 22 C and 6 C. The Museum of the
Rockies, located on the MSU campus, has a large collection of Mesozoic
specimens, including Late Cretaceous dinosaur eggs, nests and embryos, in
addition to an outstanding collection of dinosaur remains.
Schedule
Saturday, August 8 (evening) - Opening reception at Museum of the Rockies.
Sunday, August 9 and Monday, August 10 - Symposium talks and poster sessions.
Monday, August 10 (evening) - Conference banquet, keynote lecture (Jack Horner).
Technical Program
Presentations at previous Dinosaur Eggs and Babies meetings have included
dinosaur egg localities, specimen descriptions, field and laboratory methods,
biostratigraphy of eggshell, preservation and experimental taphonomy, egg
classification and ootaxonomy, eggshell microstructure and function, geochemical
signatures of diet and diagenesis, embryos and growth, reproductive behavior,
phylogenetics of eggshell and reproductive traits, and the origins of avian
reproduction. The 4th Symposium welcomes papers on these or any other topic
related to dinosaur reproduction, eggs and young. The technical program will
accommodate both oral presentations and posters. Abstract submissions are due
by May 1st, 2009 and are limited to 250 words. Details on abstract submission
will be provided in the third circular. For those interested, we will publish a
symposium volume in a special issue of Historical Biology. Because of the tight
publication schedule, adherence
to the following time line for participation will be strictly enforced.
May 1, 2009 - abstract for symposium presentations and/or volume (250 word
limit)
Oct. 1, 2009 - deadline of submission of full article
Mar. 1, 2010 - deadline for review and revisions
August, 2010 - publication
Field Trips
August 11 and 12 - Fieldtrip (option 1)
Two days, one night field trip to Egg Mountain locality in the Late Cretaceous
Two Medicine Formation of western Montana with overnight stay in Choteau. Day 1
includes tour of the Egg Mountain localities. Day 2 will be spent visiting
additional Two Medicine localities and the East Front of the Rocky Mountains.
August 11 through 14 - Fieldtrip (option 2)
Four days, 3 nights. Day 1 of this field trip will begin with visiting Egg
Mountain, with over night in Choteau. Day 2 will be spent at Devil's Coulee
nesting locality in the Oldman Formation of Alberta. Day 3 will consist of a
visit to the Royal Tyrrell Museum of Paleontology in Drumheller, Canada, and day
4 will include a visit to Dinosaur Provincial Park. This trip will end in
Calgary, Canada, with an option to return to Bozeman. Please note that
participants should be aware of the necessary requirements needed to cross into
and out of Canada.
Accommodations
Dormitory rooms are available on campus during the conference from Aug 7 – 10,
with checkout on Aug. 11. Alternatively, several motels (in addition to
restaurants, bars and shopping) are located in the downtown area, approximately
30 minutes walking distance from campus and the museum. If renting a car, other
motels are located near the freeway, approximately 4 miles or 15 minutes driving
distance. Due to closure of the dorms Aug. 11, participants in the post-meeting
field trips will need to arrange alternative accommodations for their return to
Bozeman. Excess luggage, however, may be stored during the field trips.
Bozeman offers very limited taxi service (i.e. 3 vehicles); therefore, a list of
hotels with and without airport shuttles is included. We recommend that if you
are not staying in the dormitory during the conference you may want to rent a
car or enjoy walking.
Motels
The following motels offer airport shuttle but are not within walking distance
of the museum or campus. In addition, public bus transportation to campus is
not available on weekends.
Wingate – 1 866-910-4995 222 (www.wingatebozeman.com)
Hampton Inn – 1-800 HAMPTON (www.hampton.inn.com)
Hilton Garden Inn – 1-406 582-9900 (www.bozeman.stayhgi.com)
Best Western Grandtree Inn – 1-800-624-5865 (www.bestwesterngrandtree.com)
Please Note: The Best Western Grandtree Inn offers a significant discount ($149
vs. $84/room) if 10 rooms are booked for field trip participants in advance for
the evening of August 14, 2009. Let us know if you are interested.
Other Motels/ Bed & Breakfast within 30 min walking distance of the museum and
campus but without airport shuttle service.
City Center Motor Inn – 1 (406) 587-3158.
Lewis & Clark Motel of Bozeman – 1 (406) 586--3341
Imperial Inn – 1 (800) 880-2383; 1 (406) 586-3354
Voss Inn Bed and Breakfast – 1 (406) 587-0982
The host committee welcomes your comments and suggestions and we are looking
forward to the 4th International Symposium on Dinosaur Eggs and Babies in
Bozeman!
Hi everybody,
I have just been sent the papers below...Anybody interested?
A PHYLOGENETIC ASSESSMENT OF PRISMATIC DINOSAUR EGGS FROM THE
CRETACEOUS TWO MEDICINE FORMATION OF MONTANA
DAVID J. VARRICCHIO and FRANKIE D. JACKSON
Journal of Vertebrate Paleontology 24(4):931–937,
Recognition of vertebrate egg abnormalities in the
Upper Cretaceous fossil record
Frankie D. Jackson*, James G. Schmitt
Cretaceous Research 29 (2008) 27e39
Paleobiology, 34(2), 2008, pp. 229–246
Comparison of water vapor conductance in a titanosaur egg from
the Upper Cretaceous of Argentina and a Megaloolithus siruguei
egg from Spain
Frankie D. Jackson, David J. Varricchio, Robert A. Jackson, Bernat
Vila, and
Luis M. Chiappe
THE FIRST IN SITU TURTLE CLUTCH FROM THE CRETACEOUS TIANTAI BASIN,
ZHEJIANG PROVINCE, CHINA
FRANKIE D. JACKSON,*,1 XINGSHENG JIN,2 DAVID J. VARRICCHIO,1 YOICHI
AZUMA,3 and YANGEN JIANG4
Journal of Vertebrate Paleontology 28(2):319–325, June 2008
FRANKIE D. JACKSON,*,1 XINGSHENG JIN,2 DAVID J. VARRICCHIO,1 YOICHI
AZUMA,3 and YANGEN JIANG4
Anybody interested in a PDF copy?
Brood care in a Silurian ostracod
David J. Siveter1,*, Derek J. Siveter2,3, Mark D. Sutton4
and Derek E. G. Briggs5
An exceptionally preserved new ostracod crustacean from the Silurian
of Herefordshire, England,
preserves eggs and possible juveniles within its carapace, providing
an unequivocal and unique view of
parental brood care in the invertebrate fossil record. The female
fossil is assigned to a new family and
superfamily of myodocopids based on its soft-part anatomy. It
demonstrates a remarkably conserved eggbrooding
reproductive strategy within these ostracods over 425 Myr. The
soft-tissue anatomy urges
extreme caution in classifying 'straight-hinged' Palaeozoic ostracods
based on the carapace alone and
fundamentally questions the nature of the shell-based Palaeozoic
ostracod record.
Keywords: brood care; exceptional preservation; Herefordshire
Lagersta¨tte; Myodocopa;
Ostracoda; Silurian
Interesting
http://www.world-science.net/othernews/080622_crocs
Baby Nile crocodiles' pre-hatching calls actually mean
something to their siblings and mothers, researchers have found.
The calls—which are perfectly audible to humans and sound like
"umph! umph!"—tell the other youngsters it's time to hatch, and
alert the mother to start digging up the nest, according to the group.
A hatching crocodile. (Image courtesy U.S. Geological Survey)
The findings, drawn from sound-playback experiments, confirm
what some had suspected based on anecdote, according to the
scientists, Amélie Vergne and Nicolas Mathevon of Université
Jean Monnet in France.
The calling behavior may be key to the reptiles' early survival,
and their ability to hatch together of "vital importance,"
Mathevon speculated.
"Most mortality occurs early in life and hatching
vocalizations might well attract predators. Therefore, adult
presence at the nest and its response to juvenile
vocalizations may offer protection…. In this sense, it is
important for all embryos in the nest to be ready for hatching at
the same time so that they all receive adult care and protection."
The researchers divided crocodile eggs due to hatch within 10
days into three groups. One group was played recordings of
pre-hatching calls; one was played recordings of noise; and the last
was left in silence.
The eggs played the pre-hatch sounds more often answered back, the
experimenters reported. Many of the eggs in that group also
moved. Finally, the researchers said, all of the eggs in the
pre-hatch group hatched during the playback or within 10 minutes
of it. Only once did the eggs hearing noise hatch, and the rest
hatched at least five hours after the last test.
The scientists then tested the mothers' responses to the calls. In
the zoo where the experiments were carried out, eggs are removed
from the nest within a few days of laying, the researchers
explained. In spite of this, females continue to guard the nest.
At the end of the incubation period, the researchers hid a
loudspeaker underground near the empty nest. They then played
pre-hatching calls interspersed with noise to ten mothers. The
adults more often turned their heads or moved after egg sounds than
after noise, they noted, and eight of the mothers responded to the
recorded calls by digging.
The findings appear in the June 23 issue of the research journal
Current Biology.
The behavior may have a long history, the researchers said.
"As birds also produce embryonic vocalizations that induce
parental care," they wrote, "such acoustic communication at an
early stage of development may be a shared behavioral feature of
past and present archosaurs." Archosaurs are an ancient group
of reptiles now represented by modern birds and crocodiles
Anybody Fancy a copy of the below papers?
Rusu, M. & Teodorescu, V. S.2003. Fractal structure of dinosaur
eggshell pores.The first south-east european symposium on
Interdisplinary approaches in fractal Analysis. May 7-10, Bucharest, 5pp.
A re-evaluation of the Snake Dam eggshell: Phylogenetic and temporal
implications. Paleobios 21 (1): 4
Miguel Moreno-Azanza has passed me some very good papers related to
the evolution of vertebrate reproduction!
Anybody interested in the paper send me an email!
Live birth in the Devonian period
John A. Long1,2,3, Kate Trinajstic4, Gavin C. Young2 & Tim Senden5
The extinct placoderm fishes were the dominant group of vertebrates
throughout the Middle Palaeozoic era1, yet controversy
about their relationships within the gnathostomes (jawed vertebrates)
is partly due to different interpretations of their reproductive
biology2–5. Here we document the oldest record of a
live-bearing vertebrate in a new ptyctodontid placoderm,
Materpiscis attenboroughi gen. et sp. nov., from the Late
Devonian Gogo Formation of Australia (approximately 380 million
years ago)6. The new specimen, remarkably preserved in three
dimensions, contains a single, intra-uterine embryo connected by
a permineralized umbilical cord. An amorphous crystalline mass
near the umbilical cord possibly represents the recrystallized yolk
sac.Another ptyctodont fromtheGogo Formation, Austroptyctodus
gardineri 7, also shows three small embryos inside it in the same
position. Ptyctodontids have already provided the oldest definite
evidence for vertebrate copulation8, and the newspecimens confirm
that some placoderms had a remarkably advanced reproductive
biology, comparable to that of some modern sharks and rays. The
new discovery points to internal fertilization and viviparity in
vertebrates as originating earliest within placoderms.
Please, I would appreciate if you could send me a copy of the paper!
Brian Gill <bgill@...> wrote:
Dear Colleagues,
I recently produced another paper on moa eggshell: Gill, B. J. (2007). "Eggshell characteristics of moa eggs (Aves: Dinornithiformes)." Journal of the Royal Society of New Zealand 37(4): 139-150.
If anyone wishes to have the pdf then please send an e-mail to my personal address (below).
Yours sincerely,
BRIAN GILL -------------------------------- B.J. Gill, Curator of Land Vertebrates, Auckland Museum, Private Bag 92018, Auckland, New Zealand. Deliveries: Truck Dock, Auckland Museum, The Domain, Auckland. E-mail: bgill@aucklandmuseum.com Telephone: (64 9)306-7063 Fax: (64 9)379-9956
This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal
I would greatly appreciate receiving a reprint or PDF of your paper and some other related papers on that topic.
Thank you very much for your time and assistance!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Dr. Hans-Volker Karl Geoscience Centre of the University of Göttingen, Department Geobiology, Goldschmidtstrasse 3, D-37077 Göttingen, hkarl@... or private for snailmail: Jenaer Strasse 32, D-99099 Erfurt, hvkarl@...
I recently produced another paper on moa eggshell: Gill, B. J. (2007). "Eggshell characteristics of moa eggs (Aves: Dinornithiformes)." Journal of the Royal Society of New Zealand 37(4): 139-150.
If anyone wishes to have the pdf then please send an e-mail to my personal address (below).
Yours sincerely,
BRIAN GILL -------------------------------- B.J. Gill, Curator of Land Vertebrates, Auckland Museum, Private Bag 92018, Auckland, New Zealand. Deliveries: Truck Dock, Auckland Museum, The Domain, Auckland. E-mail: bgill@aucklandmuseum.com Telephone: (64 9)306-7063 Fax: (64 9)379-9956
This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal
I recently produced another paper on moa eggshell:
Gill, B. J. (2007). "Eggshell characteristics of moa eggs (Aves: Dinornithiformes)." Journal of the Royal Society of New Zealand 37(4): 139-150.
If anyone wishes to have the pdf then please send an e-mail to my personal address (below).
Yours sincerely,
BRIAN GILL
--------------------------------
B.J. Gill, Curator of Land Vertebrates, Auckland Museum, Private Bag 92018, Auckland, New Zealand.
Deliveries: Truck Dock, Auckland Museum, The Domain, Auckland.
E-mail: bgill@... Telephone: (64 9)306-7063 Fax: (64 9)379-9956
This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal
I have a PDF copy of the article below
Buchholz, H. 1986: Die Hohle eines Spechtvogels aus dem. Eozan von
Arizona, USA (Aves, Piciformes). Verhandlungen. der
naturwissenschaftlichen Vereinigung Verh. naturwiss. Ver. Hamburg
(nF), 28: 5-25
Thanks for the data, can you send me a pdf copy?
Cheers
Eduardo Corona-M.
Centro INAH Morelos &
Seminario Relaciones Hombre-Fauna
(http://www.geocities.com/shofaun)
Instituto Nacional de AntropologÃa e Historia
-----Original Message-----
From: cogombra <cogombra@...>
To: Palaeoology@...
Sent: Sun, 25 Nov 2007 7:04 am
Subject: [Palaeoology] BIRD EGGSHELL IN DOMINICAN AMBER new paperI have
a
I have a PDF copy of the paper below:
BIRD EGGSHELL IN DOMINICAN AMBER
2007. G. Poinar, Jr., et al. Paleontology 50 (6), 1381–1383.
Abstract: Here we report an eggshell in Dominican amber, representing
the first vertebrate egg in any amber deposit. The eggshell is
compared with present-day eggs of lizards, snails and birds. Based on
the surface structure and type of shell breakage, it appears that the
most likely candidate is a bird, and with that consideration, an avian
group that produces eggs similar to the fossil in shape, size and
colouration is the Trochilidae (hummingbirds). Several possible
explanations of how the fossil could be preserved in amber are
provided. If indeed a hummingbird was involved, this discovery would
represent the first New World record of a fossil trochilid.
________________________________________________________________________
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(1) Present day Gharials occur only in perennial rivers-- the Gangetic River system, the Btahmaputra River system and the Mahanadi. During the flood, they may get swept into riverside inundations. But that is only a temporary retreat. Deep, flowing water with several tributaries, are characteristic features of natural gharial habitat. These are required for them to help them in their fish-eating habit; and that they cannot walk like mugger (C. palustris) in case the river dries up. They have to stay in perennial water bodies-- flowing and having a rich population. Laying of eggs in a pond?--- I rule out the possibility. But well, an infertile or unhatched egg could get swept out of the main riverside nesting bank.
(2) During incubation, the egg slightly swells up; irregular longitudinal fissures appear on the surface of shell; but the shell-membrane underneath the shell protects the developing young--- it will come out only when ready to
hatch.Usually (99% ++cases), the piercing of the shell membrane, with egg tooth, by the emerging hatchling is at one of the long ends of the egg. You can take this clue to compare the region from where egg sheel is missing in your specimen. However, one important point is that in a perfectly incubated egg, after hatching, the shell almost entirely flakes off (because it has become thin and brittle); what we have in our hand is the shell membrane, without calcium covering. Lala A K Singh
Xavier Panades I Blas <cogombra@...> wrote:
We have a fossil crocodile egg very similar to those laid by gharials embedded with fine clayey silt . We think that the clasy indicates that specimen was buried in a nest, dug up in an overbank’ floodplain or pond, like in modern gharials The baby crocodile likely burst out through the area where the eggshell is missing.. Shortly after the egg was filled with the fine clay silt, and later diagenetical events compacted and squashed it laterally, exerting long cracks on the eggshell layer.
"Lala A.K. Singh" <laksingh2005@yahoo.co.in> wrote:
Dear cogombra,
Gharial mother chooses a high slopy sand bank. She climbs up the bank and digs a pit with hind limbs; lays all the eggs in it and covers it back with sand. She uses front limb to draw in sand and hind limbs to ram the sand to fill up the nest.
The mother guards the nest from water. During the time she expects young ones to hatch, her visit to the nest becomes more frequent (Singh, L. A. K. and Bustard, H. R. (1977): Studies on the Indian GharialGavialis gangeticus (Gmelin) (Reptilia, Crocodilia)-V :
Preliminary observations on maternal behaviour. Indian Forester, 103 (2) : 140-149).
The mother digs out the hatchlings and carries them to water like any other croc, although it is more laborious for her. Some hatchlings follow the mother upto water.
Most important:-- the empty egg shells remain scattered at the site and offer as recognition points for hatchlings. The hatchlings tend to congregate near it along with their mother.
In communal nesting sites, (Rao, R. J. and Singh, L. A. K.(1993): Communal nesting by Gharial, Gavialis gangeticus (Gmelin) (Reptilia, Crocodilia) in national chambal Sanctuary. J.Bombay nat. Hist. Soc. 90(1) : 17-22. ) the dominant mother takes over most of the hatchlings. At this time the hatchlings tend to reorganize themselves without restricting themselves to their original site of hatching.
I will try to locate the two papers cited and may be any other relevant to maternal care in gharial, and send you these.
Regards.
Lala A K Singh
cogombra <cogombra@yahoo.co.uk> wrote:
Dear All,
Modern gharials dug up their nests in an overbank' floodplain or pond,the female lay their eggs in, and afterwards covers them with sand. I cannot find a reference where it explains what happen next. I suppose the crocodile babies harched and the broken egg is buried afterwards with sand.
Please, I would appreciate if some body can help me here.
Dr. Lala A. K. Singh, Prakruti Bhavan, Neelakantha Nagar Bhubaneswar, Orissa, PIN: 751012, INDIA Share files, take polls, and discuss your passions - all under one roof. Click here.
Dr. Lala A. K. Singh, Prakruti Bhavan, Neelakantha Nagar Bhubaneswar, Orissa, PIN: 751012, INDIA
Did you know? You can CHAT without downloading messenger. Click here
We have a fossil crocodile egg very similar to those laid by gharials embedded with fine clayey silt . We think that the clasy indicates that specimen was buried in a nest, dug up in an overbank’ floodplain or pond, like in modern gharials The baby crocodile likely burst out through the area where the eggshell is missing.. Shortly after the egg was filled with the fine clay silt, and later diagenetical events compacted and squashed it laterally, exerting long cracks on the eggshell layer.
"Lala A.K. Singh" <laksingh2005@...> wrote:
Dear cogombra,
Gharial mother chooses a high slopy sand bank. She climbs up the bank and digs a pit with hind limbs; lays all the eggs in it and covers it back with sand. She uses front limb to draw in sand and hind limbs to ram the sand to fill up the nest.
The mother guards the nest from water. During the time she expects young ones to hatch, her visit to the nest
becomes more frequent (Singh, L. A. K. and Bustard, H. R. (1977): Studies on the Indian GharialGavialis gangeticus (Gmelin) (Reptilia, Crocodilia)-V : Preliminary observations on maternal behaviour. Indian Forester, 103 (2) : 140-149).
The mother digs out the hatchlings and carries them to water like any other croc, although it is more laborious for her. Some hatchlings follow the mother upto water.
Most important:-- the empty egg shells remain scattered at the site and offer as recognition points for hatchlings. The hatchlings tend to congregate near it along with
their mother.
In communal nesting sites, (Rao, R. J. and Singh, L. A. K.(1993): Communal nesting by Gharial, Gavialis gangeticus (Gmelin) (Reptilia, Crocodilia) in national chambal Sanctuary. J.Bombay nat. Hist. Soc. 90(1) : 17-22. ) the dominant mother takes over most of the hatchlings. At this time the hatchlings tend to reorganize themselves without restricting themselves to their original site of hatching.
I will try to locate the two papers cited and may be any other relevant to maternal care in gharial, and send you these.
Regards.
Lala A K Singh
cogombra <cogombra@yahoo.co.uk> wrote:
Dear All,
Modern gharials dug up their nests in an overbank' floodplain or pond,the female lay their eggs in, and afterwards covers them with sand. I cannot find a reference where it explains what happen next. I suppose the crocodile babies harched and the broken egg is buried afterwards with sand.
Please, I would appreciate if some body can help me here.
Dr. Lala A. K. Singh, Prakruti Bhavan, Neelakantha Nagar Bhubaneswar, Orissa, PIN: 751012, INDIA
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BIRD EGGSHELL IN DOMINICAN AMBER 2007. G. Poinar, Jr., et al. Paleontology 50 (6), 1381–1383.
Abstract: Here we report an eggshell in Dominican amber, representing
the first vertebrate egg in any amber deposit. The eggshell is compared with present-day eggs of lizards, snails and birds. Based on the surface structure and type of shell breakage, it appears that the most likely candidate is a bird, and with that consideration, an avian
group that produces eggs similar to the fossil in shape, size and colouration is the Trochilidae (hummingbirds). Several possible explanations of how the fossil could be preserved in amber are provided. If indeed a hummingbird was involved, this discovery would
represent the first New World record of a fossil trochilid.
Gharial mother chooses a high slopy sand bank. She climbs up the bank and digs a pit with hind limbs; lays all the eggs in it and covers it back with sand. She uses front limb to draw in sand and hind limbs to ram the sand to fill up the nest.
The mother guards the nest from water. During the time she expects young ones to hatch, her visit to the nest becomes more frequent (Singh, L. A. K. and Bustard, H. R. (1977): Studies on the Indian GharialGavialis
gangeticus (Gmelin) (Reptilia, Crocodilia)-V : Preliminary observations on maternal behaviour. Indian Forester, 103 (2) : 140-149).
The mother digs out the hatchlings and carries them to water like any other croc, although it is more laborious for her. Some hatchlings follow the mother upto water.
Most important:-- the empty egg shells remain scattered at the site and offer as recognition points for hatchlings. The hatchlings tend to congregate near it along with their mother.
In communal nesting sites, (Rao, R. J. and Singh, L. A. K.(1993): Communal nesting by Gharial, Gavialis gangeticus (Gmelin) (Reptilia, Crocodilia) in national chambal Sanctuary. J.Bombay nat. Hist. Soc. 90(1) : 17-22. ) the dominant mother takes over most of the hatchlings. At this time the hatchlings tend to reorganize themselves without restricting themselves to their original site of hatching.
I will try to locate the two papers cited and may be any other relevant to maternal care in gharial, and send you these.
Regards.
Lala A K Singh
cogombra
<cogombra@...> wrote:
Dear All,
Modern gharials dug up their nests in an overbank' floodplain or pond,the female lay their eggs in, and afterwards covers them with sand. I cannot find a reference where it explains what happen next. I suppose the crocodile babies harched and the broken egg is buried afterwards with sand.
Please, I would appreciate if some body can help me here.
Dr. Lala A. K. Singh, Prakruti Bhavan, Neelakantha Nagar Bhubaneswar, Orissa, PIN: 751012, INDIA
Share files, take polls, and discuss your passions - all under one roof. Click here.
Dear All,
Modern gharials dug up their nests in an overbank' floodplain or
pond,the female lay their eggs in, and afterwards covers them with sand.
I cannot find a reference where it explains what happen next. I
suppose the crocodile babies harched and the broken egg is buried
afterwards with sand.
Please, I would appreciate if some body can help me here.
I have a PDF copy of the paper below:
BIRD EGGSHELL IN DOMINICAN AMBER
2007. G. Poinar, Jr., et al. Paleontology 50 (6), 1381–1383.
Abstract: Here we report an eggshell in Dominican amber, representing
the first vertebrate egg in any amber deposit. The eggshell is
compared with present-day eggs of lizards, snails and birds. Based on
the surface structure and type of shell breakage, it appears that the
most likely candidate is a bird, and with that consideration, an avian
group that produces eggs similar to the fossil in shape, size and
colouration is the Trochilidae (hummingbirds). Several possible
explanations of how the fossil could be preserved in amber are
provided. If indeed a hummingbird was involved, this discovery would
represent the first New World record of a fossil trochilid.
In one of the attachments there is are photographs of gharial egg and hatchling (embryo) within it.
Lala A K Singh
Xavier Panades I Blas <cogombra@yahoo.co.uk> wrote:
Hi,
Do you have a clear picture (to be used in a publication) of a Gharial egg?
What are their shapes?
"Lala A.K. Singh"
<laksingh2005@yahoo.co.in> wrote:
Dear all,
Gharial egg size: 82.2 +/- 3.1mm in length; 56.5 +/- 2.2mm in breadth; 154.6 +/- 15.0gm in weight (Singh, L. A. K., 1978).
I have three files which will be of interest, as a couple of months back I was supposed to mail information regarding Gharial growth hypotheses—‘egg space economy during embryonic
development’ and ‘post-hatching growth priority’. Sorry, it was not possible earlier. The mail returned back saying problem about size/space.
Please let me know when you are ready to receive these files.
The scanned pages are from the following:
SINGH, L. A. K. (1978): Ecological Studies on the Indian Gharial Gavialis gangeticus (Gmelin) (Reptilia, Crocodilia). PhD Thesis, UtkalUniversity, Bhubaneswar, Orissa, India. xvi+325pages, 93 figs., 72 tabs.
There are three files in PDF format:
(1)gharial egg LAK Singh1978 – gives information on Gharial egg required by cogombra. (1.01 MB)
(2)gharial egg-hatchling relationship LAK Singh1978 --- gives a brief intro to “egg space economy during embryonic development, (1.06 MB) and
(3)gharial snout & growth hypotheses LAK Singh1982 --- published in British J. Herpetol in 1982. (2.05MB)
Regards
Lala A K Singh
cogombra <cogombra@yahoo.co.uk> wrote:
I cannot find a publication on the size and shape of Gavialis gangeticus eggs?
Any tips?
Thank you
Dr. Lala A. K. Singh, Prakruti Bhavan, Neelakantha Nagar Bhubaneswar, Orissa, PIN: 751012, INDIA Save all your chat conversations. Find them online.
Dr. Lala A. K. Singh, Prakruti Bhavan, Neelakantha Nagar Bhubaneswar, Orissa, PIN: 751012, INDIA
In one of the attachments there is are photographs of gharial egg and hatchling (embryo) within it.
Lala A K Singh
Xavier Panades I Blas <cogombra@...> wrote:
Hi,
Do you have a clear picture (to be used in a publication) of a Gharial egg?
What are their shapes?
"Lala A.K. Singh" <laksingh2005@yahoo.co.in> wrote:
Dear all,
Gharial egg size: 82.2 +/- 3.1mm in length; 56.5 +/- 2.2mm in breadth; 154.6 +/- 15.0gm in weight (Singh, L. A. K., 1978).
I have three files which will be of interest, as a couple of months back I was supposed to mail information regarding Gharial growth hypotheses—‘egg space economy during embryonic development’ and ‘post-hatching growth priority’. Sorry, it was not possible earlier. The mail returned back saying problem about size/space.
Please let me know when you are ready to receive these files.
The scanned pages are from the following:
SINGH, L. A. K. (1978): Ecological Studies on the Indian Gharial Gavialis gangeticus (Gmelin) (Reptilia, Crocodilia). PhD Thesis, UtkalUniversity, Bhubaneswar, Orissa, India. xvi+325pages, 93 figs., 72 tabs.
There are three files in PDF format:
(1)gharial egg
LAK Singh1978 – gives information on Gharial egg required by cogombra. (1.01 MB)
(2)gharial egg-hatchling relationship LAK Singh1978 --- gives a brief intro to “egg space economy during embryonic development, (1.06 MB) and
(3)gharial snout & growth hypotheses LAK Singh1982 --- published in British J. Herpetol in 1982. (2.05MB)
Regards
Lala A K Singh
cogombra <cogombra@yahoo.co.uk> wrote:
I cannot find a publication on the size and shape of Gavialis gangeticus eggs?
Any tips?
Thank you
Dr. Lala A. K. Singh, Prakruti Bhavan, Neelakantha Nagar Bhubaneswar, Orissa, PIN: 751012, INDIA Save all your chat conversations. Find them online.
Dr. Lala A. K. Singh, Prakruti Bhavan, Neelakantha Nagar Bhubaneswar, Orissa, PIN: 751012, INDIA
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